William whitehead



(No Model.)

W.`WHITEHEAD.

PARALLEL VISE.

Patented Feb. 6, 17894,

UNITED STATES ATENE EEicE.

WILLIAM WHITEHEAD, OF MANCHESTER, ASSIGNOR. TO JAMES BASSNETT ATHERTON,OF RAINHILL, ENGLAND.

PARALLEL VISE.

SPECIFICATION forming part of Letters Patent No. 514,344, dated February6, 1894.

To all whom it may concern:

Be 1 t known that l, WILLIAM WHITEHEAD, electrical engineer, a subjectof the Queen of Great Britain, residing at Moss Side, Manchester, in thecounty of Lancaster, in the Kingdom of England, have invented certainnew and useful Improvements in Parallel V1ses,(for which I have receivedLetters Patent 1n England, No.5,782, dated March 24, 1892,). of whichthe following is a specification.

This invention relates to improvements in parallel vises, and has forits object to provide means whereby the grip of the jaws is renderedmore rapid and secure and the vise 1n itself less liable to get ont oforder, being screwless and springless.

In orderthat myinvention maybe more fully understood, I have caused tobe appended hereunto one sheet of drawings marked with letters ofreference indicatinglike parts in th e various figures.

Figure l is a side view; Fig. 2, a front view, and Fig. 3, alongitudinal section of -a parallel vise constructed in accordance withmy invention. Figs. 4 and 5 are cross sections at line A-B in Fig. 3,showing respectively the rack out of and in gear. Fig. 6 is a plan Viewof a portion ot the vise showing the inchned disks separated. Figs. '7and 8 are side yiews of the front portion of the vise, showing twomodications of my invention.

In carrying out my invention, and referring to Figs. 1, 2, 3, 4, 5 and6, I employ as usual a stationary and a movable jaw, ct and brespectively. The stationary or back jaw a, I form with a hollow body aopen at its base and ends, which body a I fix to a plate c havingratchet teeth c projecting above the base of the hollow body a. Intothis hollow body a', I t a hollow shank d adjustable therein having apartition d and closed ends d2. On the outer end of this shank, thefront movable jaw b is arranged to slide instead of, as heretofore,being formed in one with the hollow shank d. The hollow shank d, seeFig. 3, is furnished with a stud da projecting into a groove h formedlin the hollow body a of the stationary jaw a, which serves to limit theoutward movement 'of the hollow shank d. In each end of the hollow shankd and passing through the same,l mount a spindle e (No model.) Patentedin England March 24. 1892, No. 5,782.

adapted to be partially rotated and to carry and operate a rack f,having two lugs f and titled into the hollow shank d. The spindle e islongitudinally kept in position by reduc- 5g ing and furnishing its backend with a washer e rendered fast thereon and a nut e2. The rack f is inlength about equal to the stationary rack c and adapted to be raised andlow ered by the spindle e and thus brought in and 6o out of gear withthe stationary rack o. For this purpose, I form the spindle ecam shaped,say near each end e3 and at the part e4 between the lugs f. These camshaped portions e3 and e4 have an angular position of 65 about onehundred and twenty degrees relatively to each other. By preference, Iform the portion c4 between the lugs f Vconcentric with the spindle eand with a flat surface e5, see Figs. 4 and 5, which allows the rack fto be 7o instantly raised ont of gear by the cams e3. The latter arerespectively adapted to operate in a square hole, or, where avery rapidaction is required, preferably in a round one f2 having a recess, f3 (asshown in Figs. 4 and 5) 75 formed in the rack lugs f and thereby raisethe latter out of gear, see Fig. 4, while the in ner cam e4 serves topress on the rack f and thus hold it firmly in gear with the stationaryrack c when the spindle e receives a partial 8'0 turn, see Fig. 5.

The front of the spindle e is formed or furnished with a shoulder ordisk g and eye g', which latter receives the sliding pin as usual, or ahandle h, solid therewith, or screwed to it, as shown in Fig. 2. Theinner face of the shoulder or disk g, I form with a double inoline g2,Fig. l, or with a single incline, as shown in Fig. 7, adapted to operateagainst another disk g3 having a similar double or 9o single incline onthe front of the sliding front jaw b and thus displace and force thelatter home on its shank d whenever the spindle e is turned by its pinor handle h.

During the lirst part of the turn of the spin- 9 5 l dle e, the cams e3lower and the cam e4 holds the movable rack frmly in gear with thestationary rack c', thus locking the hollow shank d in position, whilethesliding front jaw b is forced home by the inclines g2. On Ioo thereturn movement of the spindle e, its end cams e3 lift the movable rackfout of gear with the stationary rack c and thus permit the longitudinaladjustment of the hollow shank cl.

In order to prevent the loose jaw b sticking on the return movement ofthe cam spindle e, the highest points of the inclines g2 are formeddovetail or nose shaped, as shown in Fig. 8, so as to engage each otherand thus tie the sliding front jaw b and hollow shank d togetherlongitudinally. For the purpose of protecting the incline or inclines g2from foreign matter I tix around the same a cover z. as shown in Fig. l,having a stud or studs i adapted to engage a groove or grooves 2 in thedisk g. This also serves to tie the two disks g g3 together in lieu ofthe dovetail projection shown in Fig. 8.

I declare that what I claim is- 1. In a vise the combination of afixedjaw havinga hollow shank provided internally with a series ofteeth, a movable jaw, a box carrying the same and extending looselythrough the fixed jaw, a spindle passing through the said box andprovided at one end with an operating handle, a locking plate carried bythe spindle, and provided with a series of teeth and with perforatedlugs to receive the spindle, and cams xed on the spindle in position toengage the lugs on the locking plate; whereby on the rotation of thespindle the locking plate will be moved to cause its teeth to engage ordisengage those on the fixed jaw and thereby lock or unlock the parts.

2. In a vise the combination of a fixed jaw having a hollow shankprovided internally with a series of teeth, a movable jaw, a boxcarrying the same and extending loosely through the fixed jaw, the saidbox being provided With closed ends d2 and with a partition d', alocking plate provided on its side with a series of teeth, and at itsends with perforated lugs, an operating spindle passing through the boxand through the perforated lugs, cams e3 on said spindle adapted toengage within the lugs for raising, and the oppositeiy disposed cam e4,near the center of the spindle for depressing said locking plate;whereby the parts may be locked by rotating the operating spindle in onedirection and unlocked by rotating itin the opposite direction.

3. The combination with the fixed and movable jaws, of the box extendinglooselythrough the same, the clamping device within the box adapted toengage one of the jaws, the spindle rotatably connected with the box andwith the clamping device to operate the latter, the spindle-head havingan active cam face, and a cam on the jaw with which the spindle-headco-acts.

4:. The combination of the fixed jaw a, movable jaw b, disk g3 attachedthereto, having an incline g2 in combination with the spindle e and diskg having a corresponding incline working on the incline of disk g3 and aclamping device worked by the spindle e whereby by turning the spindle,the clamping device comes into effect and at the same time the movablejaw is pressed forward toward the fixed jaw.

5. The combination of the spindle ehaving cams es having their maximumpoint concentric for a long distance in combination with the Aforwardpropulsion device g g3, actuated by the spindle whereby after theclamping has taken effect the spindle can turn for a considerabledistance actuating the forward movement of the loose jaw withoutunc-lamping.

6. The combination of the spindleehaving cams e3 and e4 and the clampingpieces ff whereby the clamping can be immediately applied and yet thespindle be allowed to rotate for some distance and the clamp can beimmediately withdrawn and again the spindle allowed to rotate for somedistance before the clamp is again brought into play.

7. The combination of the disk g3 attached to the movable jaw and havingan inclined plane g2, the disk g fitted to the spindle e and having asimilar inclined plane and the cover 'L' having groove i2 and stud 'i'for the purposes described.

8. The combination of the fixedjaw a, asliding but clampable device d,movable jaw b sliding on piece d and spindle e having the usual handleand head h and g with a disk g3 and a device on the spindle capable ofgiving a small longitudinal motion to said disk.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM WHITEHEAD.

Witnesses:

W. P. THOMPSON, G. C. DYMOND.

IOO

